I don't want to ruin the surprise, so just try this command. (It's harmless.)
ssh whoami.filippo.io
For the security crowd: don't worry, I don't have any OpenSSH 0day and even if I did I wouldn't burn them on my blog. Also, ssh is designed to log into untrusted servers.ha! I use https for git.
Still: interesting thing this guy pointed out.
Question: should I be using ssh? I have two factor enabled so https uses an access token which is unique for each machine I am pulling/pushing with